Fujikura Limited

Hiroiku Tayama

Ning Guan

Hiroshi Chiba

Yuichiro Yamaguchi

Takeshi Togura

Yoshihiro Niihara

Masaki Ueyama

Provided is an antenna device which is less prone to deterioration in radiation characteristics and which can be mounted in a small space. A second antenna element () includes a first portion () and a second portion (). A first antenna element () is disposed on a first plane (P), the first portion () is disposed on a second plane (P), and the second portion () is disposed on a third plane (P). When viewed in a direction orthogonal to the first plane (P), the second portion () does not overlap the first antenna element () except at an end region ().

Film antenna and antenna device

In an on-vehicle antenna device (), an on-vehicle antenna device () which is provided at an end part of a roof () includes an antenna () which has antenna elements () drawn out from one feed point () in a first direction and drawn out from another feed point () in a second direction. The first direction is direction intersecting with a horizontal plane in accordance with the on-vehicle antenna device () is mounted on a vehicle body ().

Vehicle-mounted antenna device

The present invention includes: a film antenna (); a cable () which is connected to a feed section () of the film antenna (); and a support () around which at least part of the film antenna () is wound, the support () including a holding section for holding the cable ().

Antenna device

An integrated antenna () includes: a first loop antenna () having a first annular antenna element (); and a second loop antenna () having a second annular antenna element (). The second annular antenna element () is arranged, on a surface identical to that where the first annular antenna element () is arranged, so as to surround the first annular antenna element ().

Integrated antenna, and manufacturing method thereof

An antenna element () of an antenna device has first and second root sections () and () and an intermediate section lying between the first and second root sections () and (). A feed section () is provided in the first and second root sections () and (). The first and second root sections () and () are arranged so as to surround the feed section (), and are provided in a wind section (). Tail end linear parts in the wind section () extend in respective opposite directions. At least one of the first and second root sections () and () has a wider width part, which is formed such that a portion that overlaps a feed line connected with the feed section () is larger in width than other portions. This makes it possible to realize high radiant gain and improve a VSWR characteristic for each radio wave.

Antenna device and antenna system

A loop antenna in accordance with the present invention has an antenna element having a shape that traces a closed curve, the antenna element including (i) a first projection section which projects from one of two end sections of the antenna element toward an inside of the closed curve and (ii) a second projection section which projects from the other of the two end sections of the antenna element toward the inside of the closed curve, each of the first projection section and the second projection section including a feed point.

Loop antenna

An antenna device () includes an antenna element () and an electric conductor plate () provided so as to face the antenna element (). The antenna element () and the electric conductor plate () are short-circuited by a short-circuit section (). The antenna element () is connected with both of external and internal electric conductors () and () constituting a feed line ().

A dipole antenna in accordance with the present invention includes a first antenna element provided in a two-dimensional surface and having a linear shape and a second antenna element provided in the two-dimensional surface and having a spiral shape that circles around the first antenna element.

Dipole antenna

An antenna device () includes: an antenna () including a radiating element () and an internal ground (); a coaxial cable () whose internal conductor () is connected with the radiating element () and whose external conductor () is connected with the internal ground (); and an external ground () connected with the external conductor () of the coaxial cable ().

Antenna device and antenna mounting method

An antenna device () includes: an antenna () including a radiating element () and an internal ground (); a coaxial cable () whose internal conductor () is connected with the radiating element () and whose external conductor () is connected with the internal ground (); and an external ground () capacitive-coupled with the external conductor () of the coaxial cable ().

A dipole antenna of the present invention is more compact and has a wider bandwidth as compared with a conventional dipole antenna. A dipole antenna (DP) includes antenna elements (E) and (E) on a single plane. (E) includes a linear section (E) extending from an end of (E) in a first direction, and a linear section (E) connected to (E) via a bending section (E), (E) extending from (E) in a direction opposite to the first direction. (E) includes a linear section (E) extending from an end of (E) in the direction opposite to the first direction, and a linear section (E) connected to (E) via a bending section (E), (E) extending from (E) in the first direction. (E) and (E) are such that (E) is provided between (E) and (E), and (E) is provided between (E) and (E).

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Sakura, Japan

Hiroiku Tayama